|
2007dura 01-29-2005, 09:57 PM I have averaged between 19-21 MPG on my Duramax since I bought new. For the last few months my milage has decreased to 16 MPG on my fill-up today. Truck is stock, no mods or changes, except I have used Standyne treatment a few times recently. I don't see how the Standyne could cause this, any ideas? WS6Clint 01-30-2005, 12:23 AM I have noticed mine has dropped as well. Winter grade fuel maybe? Also, where in E. TN are you? Titanium 01-30-2005, 09:44 AM I get 16mpg city/highway (driving 80mph on the highway) JEBar 01-30-2005, 10:17 AM ours is an '02 3500 ... consistently gets 15.5-16.5 mix of city/county driving to work ... 17-19 interstate travel (speed has proven to be the enemy of mileage) ... 10.5 towing a heavy 33' camper Jim TheBac 01-30-2005, 10:31 AM Winter fuel, combined with extra time needed to warm-up the truck. I've gone from consistantly 17+ (yeah, I'm on-it all the time!) to 14-15. I'm not concerned. Tom http://dieselplace.com/forum/attachment.php?attachmentid=107 Max Owner 01-30-2005, 04:33 PM Typically the milage drops off, when the colder weather shows up. Some people say that adding an addative helps compensate. | ||